You overclocked your CPU by 300MHz, but you dont know if it will operate the same as a CPU direct from the store clocked at 3.3ghz? And you did that on an ECS board with stock cooling? Something aint right.
To answer your question, yes. An OCed 3.3 will operate the same as a cpu from the satore at 3.3, if it is adequately cooled that is.